Question: a The equipotential surfaces in the neighborhood of a positive

(a) The equipotential surfaces in the neighborhood of a positive point charge are spheres. Which sphere is associated with the higher electric potential: (1) the smaller one, (2) the larger one, or (3) they are associated with the same potential?
(b) Calculate the amount of work (in electron-volts) it would take to move an electron from 12.6 m to 14.3 m away from a point charge.